I just checked the video on that pageand it sshows the belt routing differently. going from the crank to the PS pump....this totally negates the belt wrap benefits...wonder if it is an either /or kind of a thing?
The version we are refering to is the one pictured in my post. The part number 20035 which has the idler pulley added between the crank and PS Pulley. This system fits most popular old GM Muscle Cars in our Pro Touring movement like A, F, and X Bodies.